hi!, im anne from philippines i have a polycystic ovary both side, & irregular menstruation i discover it when i was in highschool.. I started to treat on my ob gyne doc she gave me metformin 500mg 3Xaday . Then she gave me a pill diane35. after all i have a friend from india she gave me a med. Namely prestovin200mg, lyscot,regestrone 5mg, can i stop my previous med? &take the med. Of my indian friend?